package inter;

public class InterfaceTest {
	public static void main(String[] args) {
	MainBoard m=new MainBoard();
	Usb u=new Udisk();
	Usb p=new MobilePhone();
	
    m.insert(u);
    m.insert(p);
    
    System.out.println();
    m.delete(u);
    m.delete(p);
	}
}
